The question is- A grocer purchased 200kg of rice at rs25 per kg. He sold 80kg of at a gain of 10% and 40kg at a loss of 4%. At what rate per kg should he sell the remainder to gain 8% on his total invesment??
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Total investment =25*200=5000rs
Earning on 80 kg and 4o kg = 80*25*10/100-40*25*4/100
=40*25(20-4)/100
=10*16=160rs
For profit o 8%on total=8*5000/100=400rs
Profit earned to left=400-160=240
remanining kg =200-120=80kg
Per kg profit=240/80=3 rs
Per kg selling rate which he should sell is 25+3=28rs
Earning on 80 kg and 4o kg = 80*25*10/100-40*25*4/100
=40*25(20-4)/100
=10*16=160rs
For profit o 8%on total=8*5000/100=400rs
Profit earned to left=400-160=240
remanining kg =200-120=80kg
Per kg profit=240/80=3 rs
Per kg selling rate which he should sell is 25+3=28rs
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